201019035 P51960159TW 29925twf.doc/n 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種影像投影系統，且更特定而言是 有關於一種在運輸系統中安裝實施之影像投影系統。疋 【先前技術】 ❹ ❹ */像技影糸統已經實施於諸如辦公、會議、家庭及運 輪系統(如車輛)之各種應用中。在具有有限空間的—些 用中(諸如車輛或其它的運輪系統中），空間受到限制。^ 了影像投影系統的可攜帶性(portability)之外，其它設: ^因素可包括亮度、影像大小、影像質量、系統所 j和位置、散熱及安全。研發或實施雜投f彡系統可包 ^因素中之—者或多者或者包括額外·計考慮。兴 2 =❹高架設置的(overhead)單一投影機(諸如爲ς =豕庭制所設計之投f彡機），會糾*能爲在後排座位 或弟二排的乘客提供可視的大屏幕的性能限制。 ^圖i中繪示，Sat0的美國專利第7,275,832號緣示 二=設_實例。參關1，此純包括祕容納安裝 ;c的投職之盒體B和用於反射雌示影像之屏幕 動，二體?ί::’要關心到’由於移動車輛C的頻繁振 Ξ如·^ 會移動或掉落。科，投影機的某些部份， 的車厢空間中會產生大量的熱量。此熱 3 201019035 P51960159TW 29925twf.doc/n 可攜帶性降低之憂慮。 圖2繪示了另一現有技術的投影設備。圖2係來自於 美國專利公開案號第2007/0153237號。參照圖2，此設備 包括：光源102、投影機頭1〇3以及連接在二者之間的光 纖4。此設備在光源102和投影機頭103處均要求複雜及 昂貴的光學透鏡。在一些情況中，光纖4可具有大約數微 米至數十微米級的直徑，並且要求使用耦合透鏡6、準直 ❿ 透鏡(collimate lens)109或以上二者。在一些或所有的情況 中使用複雜及昂貴的透鏡可增加投影設備的設計成本及製 造成本。另外，還會增加設備的總體大小。 【發明内容】 在一實施例中，本發明提供一種影像投影系統。此影 像投影系統可包括光源、光導及影像投影模組。光源用以 提供平面照射(planar illumination)。光導具有第—端和第一 立而’其中弟一 h與光源麵合，以接收平面照射，而第二端 ® 則用以提供經傳輸的平面照射。光導可具有—内部結構， 此内部結構可提供用於反射從第一端接收的平面照^之反 射面。影像投影模組可與光導的第二端輕接，用以接收影 像訊號輸入’並且透過經傳輸的平面照射將影像訊號投影 成影像。 &又办 在另一實施例中，本發明提供一種影像投影系統。此 影像投影系統可包括光源、光導及影像投影模組。光源可 用以提供照射。光導具有第一端和第二端，其中第一端與 4 201019035 P51960159TW 29925twf.doc/n 光源耦合，以接收照射，而第二端則用以提供經傳輸的照 射。光導在第一端和第二端之間可具有單管道(single duct) 並且可包括一内部結構，此内結構提供用於反射從第一端 接收的照射之反射面。影像投影模組可與光導的第二端耦 合並且用以接收影像訊號輸入，並且透過經傳輸的照射將 影像訊號投影成影像。 在另一實施例中，本發明提供一種影像投影系統。此 ❹ 影像投影系統可包括光源、光導及影像投影模組。光源用 以提供平面照射。光導可具有第一端和第二端，其中第一 端與光源耦合以接收平面照射並且第二端用以提供經傳輸 的平面照射。光導在第一端和第二端之間可具有單管道並 且包括内部結構，此内部結構提供用於反射從第一端接收 的平面照射之反射面。影像投影模組可與光導的第二端耦 δ並且用以接收影像訊號輸入，並且透過經傳輸的平面昭 射將影像訊號投影成影像。 … 應理解，前述一般描述及以下詳細描述均僅為例示性 &_性的’而並不關所主騎本發明。 【實施方式】 參照圖3，影像投影系統1〇〇可包括照射單 、影像投影模組400及光導5〇〇。光源3〇〇用 ^ 面照射’諸如在平面上具有均勻的或相同的亮度之昭身卜 S 遠離於影像投影模組侧放置。舉例 木发在只鉍例中，可將光源3〇〇放置在車輛的行李箱 5 201019035 P51960159TW 29925twf.doc/n 中。此設計可移除乘客車厢熱量産生的主要來源，並且可 避免乘客車厢中的溫度增加或者其它的與熱量相關的安^ 顧慮。另外，光源300可包括製冷風扇或其它的製冷設備。 遠程光源設置可減小或避免製冷設備的其他影響，諸如噪 音或氣流。 在一貝例中’衫像投影权組400可安裝於車輛，諸如 安裝於車輛的内頂。影像投影系統1〇〇可安裝於家庭、辦 φ 公、或會議的空間中’而且也可安裝於運輸系統，諸如車 輛、飛機、船舶及火車。對於使用影像投影系統的運輸設 備而言，可將此系統安裝於乘客車厢、座位上或者安裝= . 墙壁或其他結構(structure)中的一者上。 參圖4，爲了將光線從光源3〇〇引導至影像投影模 組400 ’可採用光導500。在一實施例中，光導5〇〇具有第 一端505和第一端510並且是用以可在兩端之間提供嚴忠 道的單管道式光導。第一端505可與光源300耦合^接二 平面照射，並且第二端用以提供經傳送的平面照射。 光導500可包括一内部結構，此内部結構提供用於反射從 第一端接收的平面照射之反射面。影像投影模組4〇〇可與 光導500的第二端510粞合並且可用以接收輸入的影像訊 號，諸如視頻或影像訊號，並且透過經傳輸的平面照射將 影像訊號投影成影像。此影像投影系統可在牆壁上投影影 像或者可包括用於反射經投影的影像之屏幕55〇。 / 在灵施例中，光導500可包括核心層（core)，諸如用 於將光線從第一端505導引至第二端510的波導。光導5〇〇201019035 P51960159TW 29925twf.doc/n VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to an image projection system, and more particularly to an image projection system installed and implemented in a transportation system.疋 [Prior Art] ❹ ❹ */ like technology has been implemented in various applications such as office, conference, home and transportation systems (such as vehicles). In some applications with limited space, such as in vehicles or other transport systems, space is limited. ^ In addition to the portability of the image projection system, other settings: ^ factors can include brightness, image size, image quality, system and location, heat dissipation and security. The development or implementation of a miscellaneous investment system may include one or more of the factors or include additional considerations. Xing 2 = ❹ overhead overhead projector (such as the 彡 豕 豕 设计 设计 ) design), will be able to provide a visible large screen for passengers in the rear seat or the second row of passengers Performance limitations. U.S. Patent No. 7,275,832 to Sat0, which is incorporated herein by reference. Participation 1, this pure includes the secret accommodation installation; c's box B and the screen for reflecting the female image, the two body? ί:: 'to be concerned about' due to the frequent vibration of the moving vehicle C ·^ will move or drop. Branches, some parts of the projector, generate a lot of heat in the cabin space. This heat 3 201019035 P51960159TW 29925twf.doc/n worries about reduced portability. Figure 2 illustrates another prior art projection device. Figure 2 is from U.S. Patent Publication No. 2007/0153237. Referring to Fig. 2, the apparatus includes a light source 102, a projector head 1〇3, and a fiber 4 connected therebetween. This device requires complex and expensive optical lenses at both the source 102 and the projector head 103. In some cases, the optical fiber 4 may have a diameter on the order of several micrometers to tens of micrometers, and it is required to use a coupling lens 6, a collimating lens 109, or both. The use of complex and expensive lenses in some or all cases can increase the cost and cost of designing the projection device. In addition, it will increase the overall size of the device. SUMMARY OF THE INVENTION In one embodiment, the present invention provides an image projection system. The image projection system can include a light source, a light guide, and an image projection module. The light source is used to provide planar illumination. The light guide has a first end and a first end and wherein the second side is in contact with the light source to receive the planar illumination, and the second end ® is used to provide a transmitted planar illumination. The light guide can have an internal structure that provides a reflective surface for reflecting the planar image received from the first end. The image projection module can be lightly coupled to the second end of the light guide for receiving the image signal input ′ and projecting the image signal into an image through the transmitted planar illumination. & Yet another embodiment, the present invention provides an image projection system. The image projection system can include a light source, a light guide, and an image projection module. A light source can be used to provide illumination. The light guide has a first end and a second end, wherein the first end is coupled to the 4 201019035 P51960159TW 29925twf.doc/n source to receive illumination and the second end is used to provide transmitted illumination. The light guide can have a single duct between the first end and the second end and can include an internal structure that provides a reflective surface for reflecting illumination received from the first end. The image projection module is coupled to the second end of the light guide and configured to receive the image signal input and project the image signal into the image through the transmitted illumination. In another embodiment, the present invention provides an image projection system. The image projection system can include a light source, a light guide, and an image projection module. The light source is used to provide planar illumination. The light guide can have a first end and a second end, wherein the first end is coupled to the light source to receive planar illumination and the second end is to provide transmitted planar illumination. The light guide can have a single conduit between the first end and the second end and include an internal structure that provides a reflective surface for reflecting planar illumination received from the first end. The image projection module can be coupled to the second end of the light guide and used to receive the image signal input, and project the image signal into an image through the transmitted plane illumination. It is to be understood that the foregoing general description and the following claims [Embodiment] Referring to Fig. 3, an image projection system 1A may include an illumination sheet, an image projection module 400, and a light guide 5A. The light source 3 is illuminated by a surface, such as a uniform or the same brightness on a plane, which is placed away from the side of the image projection module. For example, in the case of wood, the light source 3〇〇 can be placed in the trunk of the vehicle 5 201019035 P51960159TW 29925twf.doc/n. This design removes the primary source of heat generation in the passenger compartment and avoids temperature increases or other heat related concerns in the passenger compartment. Additionally, light source 300 can include a refrigeration fan or other refrigeration device. Remote light source settings reduce or avoid other effects of the cooling unit, such as noise or airflow. In a shell example, the shirt image projection weight group 400 can be mounted to a vehicle, such as an inner roof of a vehicle. The image projection system 1 can be installed in a home, office, or conference space' and can also be installed in transportation systems such as vehicles, airplanes, ships, and trains. For transport equipment using an image projection system, the system can be mounted on a passenger compartment, on a seat, or on one of the walls or other structures. Referring to Figure 4, a light guide 500 can be employed to direct light from the source 3〇〇 to the image projection module 400'. In one embodiment, the light guide 5 has a first end 505 and a first end 510 and is a single-pipe light guide that provides a sturdy relationship between the ends. The first end 505 can be coupled to the light source 300 for biplane illumination and the second end for providing transmitted planar illumination. Light guide 500 can include an internal structure that provides a reflective surface for reflecting planar illumination received from the first end. The image projection module 4 can be coupled to the second end 510 of the light guide 500 and can be used to receive an input image signal, such as a video or video signal, and project the image signal into an image through the transmitted planar illumination. The image projection system can project an image on a wall or can include a screen 55 for reflecting the projected image. In the embodiment, the light guide 500 can include a core, such as a waveguide for directing light from the first end 505 to the second end 510. Light guide 5〇〇
201019035 P51960159TW 29925twf.doc/n 還可包括外層，諸如包覆層(eladding)，其由相對於核心層 率之材質製成。折射率的差別允許光i ΐ起近似完全的内反射’因此減小了因傳輸而 ϋί 2 此設計可引導光線通過(d0職細ugh) ，其從行李箱到乘客車厢具有所繪示之直路徑 者可具有彎曲路徑）0 工〆 光原300 了採用各種結構以減小的光線損耗來將光線 才曰引至Ϊ導5〇0。參照圖4，光源300可包括用於産生光線 ^發光單元305和與發光單元305麵合的反射器31〇。在 一些實施例中，取决於所作應用，發光單元3〇5可爲燈、 雷射二極體或LED _。在各種實_巾，發光單元可使 用-個或多個不同的照明源，諸如金屬燈、_化物燈、白 熱絲燈(filament lamp)、f光燈、弧光燈、氤氣燈、有機或 無機LED、雷射二極體等，其可以是獨立單元或者是一（或 二)、.隹陣列。反射态310可提供高反射表面，以收集由發光 單元305所發射的光線。基於諸如所使用的發光單元305、 第一端505的大小、光導5〇()的反射特性或角度之各種因 素，反射器310可改變其設計或配置。可採用諸如焦點反 ^器、拋物線反射器或橢圓反射器或其它的反射器。發光 單元305可疋位於焦點處或者相對於反射器的設計位 置上以將大部份的照射光線指引至光導500。在一實施例 中，從反射器310反射的光線和從發光單元3〇5發射的光 線可不依賴於透鏡而進入光導5〇〇的第一端5〇5，這在一 些應用中是複雜或者昂貴的。透過光導5〇〇指引光線並且 7 201019035 P51960159TW 29925twf.doc/n 此光線可在第二端510處提供平面光線照射。在一些實施 例中，因爲波導515的直徑可約爲若干毫米量級，可減小 在第二端505處的光線泄漏，並且可達成照射光線的高耦 合效率。 在另一實施例中，如圖5中繪示，光源3〇〇可包括轉 換(conversion)或聚合(converging)透鏡單元3丨5以及用以收 集發射光線、反射光線或以上二者之反射器31〇。聚合或 • 轉換透鏡單元315可用以接收來自發光單元的光線並指引 該光線以提供平面照射。作爲實例，聚合透鏡單元315可 以是用以提供聚合或收集光線之收集透鏡、線性或二維透 鏡陣列或其它透鏡單元。參照圖5，發光單元3〇5可定位 於反射器310的焦點處，此反射器31〇沿實質上平行於收 集透鏡315的光轴之路徑指引反射光線。其後光線發送或 聚合至第一或輸入端505。 參照圖6，發光單元305可爲平面光源或照射陣列。 舉例來說，可用具有兩個或多個光線發射二極體(LED)的 ® 陣列作爲平面光源。爲了指引光線至光導5〇〇的第一或輸 入端505,可採用諸如複合式拋物線聚能器(cpc)之透鏡或 透鏡單元。從不同的位置發射的光線可從各種方向或以很 寬的入射角度範圍進入此透鏡單元或CPC，但朝向第—或 輸入端505以相對較小的角度出射。 在一些實施例中，透過光導500引導從第一輸入5〇5 進入的光線。波導515的較大直徑在光導500的第二或輸 出末端510處可提供平面照射32〇。平面照射32〇可爲影 201019035 P51960159TW 29925twf.doc/n 像投影提供合適的光線。相較於點光源輸出，在一些實施 例中平面照射可避免對準直透鏡的需求’因此可簡化設計 並減小總成本和複雜度。而且，可藉由完全内反射來操作 光導500並且可提供相對較高的光線傳輸效率。在一實施 例中，仍可在輸出末端510或在影像投影模組4〇〇内（諸如 沿平面照射320的光軸)使用諸如光學積分器或透鏡陣列 之光學透鏡單元。在一實施例中，光學透鏡單元可用來均 φ 勻化來自平面照射320的光線以改善或調整光線分布均勻 度。 在一些實施例中’因爲波導515的相對較大直徑，可 簡化在輸入端505使用的聚合透鏡單元315及在輸出末端 510使用的光學透鏡單元。無透鏡或具有已簡化的透鏡之 設計靈活性可減小設計和製造的成本。 參照圖7，投影系統1〇〇可包括兩個或多個光源，諸 如圖7中繪示的三個照射單元3〇〇。因此，光導5〇〇可具 有多個輸入端或支部，其中各輸入端或支部與照射單元耦 合。輸入端505可與相應的照射單元的光軸對準。藉由在 輸出端提供的結合效果，來自不同輸入端的光線可穿過光 V 500並藉由光導5〇〇結合。如之前所描述，因爲波導515 的折射率高於包覆層520的折射率，透過完全内反射可以 很小光線損耗來傳輸光線。並且照射和光導可用以在光導 500的輸出末端提供平面照射。作爲選擇性實施例，對於 兩個或夕個衫像技影模組，光導可用以具有—個輸入端和 兩個或多個輸出端。對於兩個或多個影像投影模組，其還 201019035 P51960159TW 29925twf.doc/n 可用以具有兩個或多個輸入端以及兩個 對熟知此領域之技藝者而言，可對所揭 施例作出各種修改及變型。所揭露的實 例性說明。本發明的範圍以以下的申請專利範圍為^作不 【圖式簡單說明】 圖1繪示了現有技術中的習知投影設備。 圖2繪示了現有技術中的另一習知投影設備。 圖3根據某些已公開的實施例繪示了影像投影系統的 示例性設置。 圖4根據某些已公開的實施例繪示了影像投影系統及 其光源的示例性結構。 圖5根據某些已公開的實施例繪示了影像投影系統及 其光源的另一示例性結構。 圖6根據某些已公開的實施例繪示了影像投影系統及 其光源的另一示例性結構。以及 圖7根據某些已公開的實施例繪示了光導的實例。 【主要元件符號說明】 100 :影像投影系統 102 :照射單元或光源300 300 :光源 305 :發光單元 310 :反射器 10 201019035 FMybU n9TW 29925twf.doc/n201019035 P51960159TW 29925twf.doc/n may also include an outer layer, such as an eladding, made of a material relative to the core layer. The difference in refractive index allows the light i to pick up near-complete internal reflection' thus reducing the transmission ϋί 2 This design guides the light through (d0 job ugh), which has the description from the trunk to the passenger compartment The straight path can have a curved path. 0 The work light source 300 uses various structures to reduce the light loss to the light guide 5〇0. Referring to FIG. 4, the light source 300 may include a light emitting unit 305 and a reflector 31A that is in contact with the light emitting unit 305. In some embodiments, depending on the application, the lighting unit 3〇5 can be a light, a laser diode or an LED_. In various embodiments, the lighting unit may use one or more different illumination sources, such as metal lamps, _ ss, slabs, filament lamps, arc lamps, xenon lamps, xenon lamps, organic or inorganic LEDs, laser diodes, etc., which may be stand-alone units or one (or two), . The reflective state 310 can provide a highly reflective surface to collect the light emitted by the illumination unit 305. The reflector 310 can change its design or configuration based on various factors such as the illumination unit 305 used, the size of the first end 505, the reflective characteristics or angle of the light guide 5(). A reflector such as a focus reversal, a parabolic reflector or an elliptical reflector or the like can be employed. The illumination unit 305 can be positioned at the focus or relative to the design of the reflector to direct most of the illumination to the light guide 500. In an embodiment, the light reflected from the reflector 310 and the light emitted from the light emitting unit 3〇5 may enter the first end 5〇5 of the light guide 5〇〇 independent of the lens, which is complicated or expensive in some applications. of. Light is directed through the light guide 5 and 7 201019035 P51960159TW 29925twf.doc/n This light can provide planar light illumination at the second end 510. In some embodiments, because the diameter of the waveguide 515 can be on the order of a few millimeters, light leakage at the second end 505 can be reduced and high coupling efficiency of the illumination can be achieved. In another embodiment, as illustrated in FIG. 5, the light source 3A may include a conversion or converging lens unit 3丨5 and a reflector for collecting emitted light, reflected light, or both. 31〇. The polymerization or • conversion lens unit 315 can be used to receive light from the illumination unit and direct the light to provide planar illumination. As an example, polymeric lens unit 315 can be a collection lens, a linear or two-dimensional lens array, or other lens unit to provide for polymerization or collection of light. Referring to Figure 5, the illumination unit 3〇5 can be positioned at the focus of the reflector 310, which directs the reflected light along a path substantially parallel to the optical axis of the collection lens 315. The light is then transmitted or aggregated to a first or input 505. Referring to FIG. 6, the light emitting unit 305 may be a planar light source or an illumination array. For example, a ® array with two or more light-emitting diodes (LEDs) can be used as a planar light source. To direct light to the first or input end 505 of the light guide 5, a lens or lens unit such as a compound parabolic concentrator (cpc) may be employed. Light emitted from different locations can enter the lens unit or CPC from a variety of directions or over a wide range of angles of incidence, but exit at a relatively small angle toward the first or input 505. In some embodiments, light entering from the first input 5〇5 is directed through the light guide 500. The larger diameter of the waveguide 515 provides planar illumination 32 在 at the second or output end 510 of the light guide 500. Plane illumination 32 〇 can be a shadow 201019035 P51960159TW 29925twf.doc/n The projection light provides the right light. Compared to point source output, planar illumination can avoid the need to align straight lenses in some embodiments' thus simplifying design and reducing overall cost and complexity. Moreover, the light guide 500 can be operated by total internal reflection and can provide relatively high light transmission efficiency. In one embodiment, an optical lens unit such as an optical integrator or lens array can still be used at the output end 510 or within the image projection module 4 (such as the optical axis along the planar illumination 320). In one embodiment, the optical lens unit can be used to homogenize the light from the planar illumination 320 to improve or adjust the uniformity of the light distribution. In some embodiments, because of the relatively large diameter of the waveguide 515, the polymeric lens unit 315 used at the input 505 and the optical lens unit used at the output end 510 can be simplified. Design flexibility without lenses or with simplified lenses reduces the cost of design and manufacturing. Referring to Figure 7, the projection system 1A may include two or more light sources, such as three illumination units 3A as shown in Figure 7. Thus, the light guide 5 can have a plurality of inputs or branches, with each input or branch being coupled to the illumination unit. The input 505 can be aligned with the optical axis of the respective illumination unit. Light from different inputs can pass through light V 500 and be coupled by light guide 5 藉 by the bonding effect provided at the output. As described earlier, since the refractive index of the waveguide 515 is higher than the refractive index of the cladding layer 520, light can be transmitted by a small amount of light loss by total internal reflection. And the illumination and light guides can be used to provide planar illumination at the output end of the light guide 500. As an alternative embodiment, the light guide can be used with two inputs and two or more outputs for two or one of the jersey embodiments. For two or more image projection modules, 201019035 P51960159TW 29925twf.doc/n can also be used to have two or more inputs and two for those skilled in the art, the disclosed embodiments can be made Various modifications and variations. The illustrative examples disclosed. The scope of the present invention is defined by the following claims. FIG. 1 illustrates a conventional projection apparatus in the prior art. FIG. 2 illustrates another conventional projection device in the prior art. Figure 3 illustrates an exemplary arrangement of an image projection system in accordance with certain disclosed embodiments. 4 illustrates an exemplary structure of an image projection system and its light source, in accordance with certain disclosed embodiments. Figure 5 illustrates another exemplary structure of an image projection system and its light source, in accordance with certain disclosed embodiments. Figure 6 illustrates another exemplary structure of an image projection system and its light source, in accordance with certain disclosed embodiments. And Figure 7 illustrates an example of a light guide in accordance with certain disclosed embodiments. [Description of main component symbols] 100: image projection system 102: illumination unit or light source 300 300: light source 305: illumination unit 310: reflector 10 201019035 FMybU n9TW 29925twf.doc/n
315 :聚合透鏡單元 320 :平面照射 400 :影像投影模組 500 :光導 505 :第一端 510 :第二端 515 :波導 520 :包覆層315: polymeric lens unit 320: planar illumination 400: image projection module 500: light guide 505: first end 510: second end 515: waveguide 520: cladding